Only want user to put in one value

JR1010

Here's the situation: 

 

I have a module with two Boolean line items that should act as the inverse of each other. As an end user, I should not be able to click both boxes. Screenshot below 

 

 

Basically, If the user picks the home team to win they should not be able to choose the Away Team to Win.

 

I thought IF Home Team to Win? = TRUE ELSE FALSE would work but I continue to get this error. 

 

Thanks!

 

 

rob_marshall

@JR1010 

 

What about this formula for the Away Team:  Not  Home Team to Win?

JR1010

Did the trick- thanks!